Contraction. - Thu.
Thuja Occidentals. Nat. ord., Conifers.
Synonyms. - Arbor Vita3, Cedrus Lycea.
Fig. - Flora Horn., pl. 73.
American Arbor Vitas. For. names: German, Lebens-baum; French, Thuja du Canada.
Habitat. - Canada and United States. Extensively cultivated as an evergreen.
Flowering time. - May and June.
Parts employed. - The young shoots.
Characters. - Young shoots compressed, vertical, covered with closely imbricated leaves, which are small, obtuse, with a point, smooth; those of the 2 opposite rows compressed and keeled; the intermediate ones flat, with a glandular point or cell of resin at the back. When rubbed between the hands it gives off a peculiar aromatic resinous odour.
Time for collecting. - At the commencement of flowering.
Preparation. - Tincture, corresponding in alcoholic strength with 20 O.P. spirit.
Reference to Horn. Proving. - R. A. M. L., v. (Est. Zeitsch. f. Hom., iv.
Proper forms for dispensing. - φ and upwards, Tincture, Pilules, or Globules.
Average loss of moisture, 58 per cent.